Superior sound from floorstanders?
Interesting claim. I used to think that too. Mission 752s, Sansui AU-717 and the 217 amps, Marantz SA7001-KI. I loved this setup. Brilliant sound.
And if you need to shift a lot of bass, or to a degree, scale, then a floorstander is one way to do it. The Eggleston Works pair I heard recently were pretty damn impressive and see also the Alchris Audio and PMCs too.
On the other hand, standmount aren't short of talent either. They'll often image better, and aren't short of scale and dynamics especially in the larger models. Adding a subwoofer and trimming the sub's input to blend in rather than just bludgeon the overall presentation makes for an even more satisfying whole.
There's no right or wrong answer here. It's down to taste, preferences, available room size and budget.
Pound for pound? These days though, I'd take standmount speakers, active at that, and add the sub. Tremendous pairing.